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In this research, we simulated debris flow hits against the slit dam by artificial channel, there are three different kinds of slit dam, they differentiate between geometric shape, include vertical-type, slant-type, and curve-type. In order to acquire the impact force which parallel and perpendicular to the artificial channel, load cell was set up behind the model, and another one was set up on the model. Under the same experiment conditions, we can figure out the different from the impact force of three kinds models. The best kind of model which received the fewest force and made by fewest materials will be found, thus it can be applied to the prevention of debris flow in the future.
The impact force of three kinds slit dam models influenced by debris flow is bigger with more discharge of debris flow and steeper artificial channel. Under the same experiment conditions, the vertical-type slit dam was received largest impact force of debris flow, and curve-type slit dam was received fewest force. These results pointed out the curve-type slit dam have two advantages of prevention of debris flow: 1. received the fewest force(hard to damage), 2. smallest volume(save the materials).
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